Anal fistula surgery for 3 years a little bleeding, may be the emergence of internal hemorrhoids, but also may be the emergence of intestinal polyps and malignant tumors, you can go to the hospital to do anal fingerprinting, anoscopy, etc., to clarify the symptoms, and under the guidance of the doctor symptomatic treatment. 1. Internal hemorrhoids: they are hemorrhoids that grow above the tooth line and are located inside the anus, and may cause symptoms such as difficulty in defecation, pain in defecation, bleeding, etc. They can be treated by taking medicines such as Diosmin tablets and MaiZhiLing under the guidance of the doctor, and need to be treated by surgical resection if the symptoms cannot be improved. 2. Intestinal polyps: they are benign proliferative lesions in the intestinal tract, which may cause bleeding, colonic obstruction and other symptoms; if not treated in time, they may become cancerous, and the main treatment is surgical resection. 3. Malignant tumors: malignant tumors may occur in the rectum, which may cause local bleeding and pain, and it is necessary to go to the hospital in time and be treated by surgical resection under the guidance of the doctor. People with the above symptoms, usually take a light diet, eat less spicy and stimulating food, avoid too long bowel movements, pay attention to the combination of work and rest, and once you find the phenomenon of blood in the stool, actively cooperate with the doctor’s treatment.